Giant Backscattering Peak in Angle-Resolved Andreev Reflection

Details Giant Backscattering Peak in Angle-Resolved Andreev Reflection Giant Backscattering Peak in Angle-Resolved Andreev Reflection

1995-01-03

arxiv.org/abs/cond-mat/9501003v1

Phys.Rev.B 51 (1995) 13883

Physics

Condensed Matter

Instituut-Lorentz, Leiden, The Netherlands, 4 pages, REVTeX-3.0, 3 figures

Scientific paper

10.1103/PhysRevB.51.13883

It is shown analytically and by numerical simulation that the angular distribution of Andreev reflection by a disordered normal-metal -- superconductor junction has a narrow peak at the angle of incidence. The peak is higher than the well-known coherent backscattering peak in the normal state, by a large factor G/G_0 (where G is the conductance of the junction and G_0=2e^2/h). The enhanced backscattering can be detected by means of ballistic point contacts.

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